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/* ************************************************************************
#module(Smokeping)
************************************************************************ */
/**
* Lets you selcet an Area. Depending on the angel of your selection you get
* a time, a range or both.
*
*/
qx.Class.define('Smokeping.ui.Zoomer',
{
extend: qx.ui.layout.CanvasLayout,
include: Smokeping.ui.MPosition,
/*
*****************************************************************************
CONSTRUCTOR
*****************************************************************************
*/
/**
* @param target {Widget} What surface should we base our selection on
*
* @param width {Integer} Width of the 'interesting' area of the target
*
* @param height {Integer} Height ot the 'interesting' area of the target
*
* @param right {Integer} Distance from the right edge
*
* @param top {Integer} Distance from the top
*
* The zoomer will not activate if the ctrl key is pressed. This allows
* for the Mover to act on these events
*
*/
construct: function (target,width,height,top,right) {
this._target = target;
this._width = width;
this._height = height+1; // some where the calc is 1 off. this fixes it
this._top = top;
this._right = right;
with(this){
base(arguments);
set({
width: '100%',
height: '100%',
visibility: false
});
}
var zoomer_defaults = {
backgroundColor: 'black',
opacity: 0.1,
overflow: 'hidden' // important to make box go to 'zero height' on ie6
};
var dir = ['left','right','top','bottom' ];
var z = [];
this._zoomer = z;
for(var i=0;i<dir.length;i++){
z[dir[i]] = new qx.ui.basic.Terminator();
z[dir[i]].set(zoomer_defaults);
this.add(z[dir[i]]);
}
z['frame'] = new qx.ui.basic.Terminator();
z['frame'].set(zoomer_defaults);
z['frame'].set({
opacity: 1,
backgroundColor: 'transparent',
border: new qx.ui.core.Border(1,'dotted','#808080')
});
this.add(z['frame']);
this._zooming = false; // we are not curently in zoom mode
this._target.addEventListener("mousedown", this._zoom_start,this);
this._target.addEventListener("mousemove", this._zoom_move,this);
this._target.addEventListener("mouseup", this._zoom_end,this);
},
members: {
_zoom_start: function(e){
if (e.isCtrlPressed()) return;
this._zooming = true;
var z = this._zoomer;
this._init_cache();
this._selector_start_x = this._get_mouse_x(e);
this._selector_start_y = this._get_mouse_y(e);
this._target.setCapture(true);
this._zoom_move(e);
this.setVisibility(true);
},
_zoom_move: function(e){
var z = this._zoomer;
if (this._target.getCapture() && this._zooming ){
var mouse_x = this._get_mouse_x(e);
var mouse_left_x;
var mouse_right_x;
if (mouse_x > this._selector_start_x){
mouse_left_x = this._selector_start_x;
mouse_right_x = mouse_x;
}
else {
mouse_right_x = this._selector_start_x;
mouse_left_x = mouse_x;
}
var mouse_y = this._get_mouse_y(e);
var mouse_top_y;
var mouse_bottom_y;
if (mouse_y > this._selector_start_y){
mouse_top_y = this._selector_start_y;
mouse_bottom_y = mouse_y;
}
else {
mouse_bottom_y = this._selector_start_y;
mouse_top_y = mouse_y;
}
var time_sel = 1;
var range_sel = 1;
var pi = 3.14159265;
var angle = Math.atan ((mouse_right_x - mouse_left_x) / (mouse_bottom_y - mouse_top_y));
if ( angle > Math.PI/2 * 0.85){
range_sel = 0;
}
if ( angle < Math.PI/2 * 0.15){
time_sel = 0;
}
z['top'].set({
left: time_sel ? mouse_left_x : this._canvas_left,
width: time_sel ? mouse_right_x - mouse_left_x : this._width,
top: 0,
height: range_sel ? mouse_top_y : this._canvas_top
});
z['bottom'].set({
left: time_sel ? mouse_left_x : this._canvas_left,
width: time_sel ? mouse_right_x - mouse_left_x : this._width,
top: range_sel ? mouse_bottom_y : this._canvas_top + this._height,
height: range_sel ? this._image_height - mouse_bottom_y : this._canvas_bottom
});
z['left'].set({
width: time_sel ? mouse_left_x: this._canvas_left,
height: this._image_height
});
z['right'].set({
left: time_sel ? mouse_right_x : this._image_width - this._canvas_right,
width: time_sel ? this._image_width - mouse_right_x : this._canvas_right,
height: this._image_height
});
z['frame'].set({
left: time_sel ? mouse_left_x : this._canvas_left,
width: time_sel ? mouse_right_x - mouse_left_x : this._width,
top: range_sel ? mouse_top_y : this._canvas_top,
height: range_sel ? mouse_bottom_y - mouse_top_y : this._height
});
}
},
_zoom_end: function(e){
if (!this._zooming) return;
var z = this._zoomer;
this._target.setCapture(false);
this.setVisibility(false);
this._zooming = false;
if (z['bottom'].getTop() == z['top'].getTop()+z['top'].getHeight()){
this._zoom_factor_top = 0;
this._zoom_factor_bottom = 0;
}
else {
var prev_factor = 1 - this._zoom_factor_top - this._zoom_factor_bottom;
this._zoom_factor_top =
(z['top'].getHeight()-this._canvas_top)/this._height * prev_factor
+ this._zoom_factor_top;
this.zoom_factor_bottom =
(z['bottom'].getHeight()-this._canvas_bottom)/this._height * prev_factor
+ this._zoom_factor_bottom;
}
}
}
});
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